<template>
  <div class = "list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class='button-list'>
          <div class='button-wrapper'>
             <div class="button">{{currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class='button-list'>
          <div class='button-wrapper'
               v-for="item in hot"
               :key="item.id"
               @click = "handleCityClick(item.name)"
          >
             <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
        v-for="(item,key) of cities"
        :key="key"
        :ref = "key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list" v-for="innerItem of item"
         :key="innerItem.id"
         @click = "handleCityClick(innerItem.name)"
        >
          <div class="item border-bottom">
          {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState , mapMutations} from "vuex"
export default {
  name: 'CityList',
  computed:{
	  ...mapState ({
		  currentCity: 'city'
	  })
  },
  props: {
    cities: {
      type: Object
    },
    hot: {
      type: Array
    },
    letter: String
  },
  data () {
    return {

    }
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper, {})
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
   @import "~styles/varibles.styl";
   .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
   .border-bottom
    &:after
      border-color #ccc
   .list
      overflow hidden
      position absolute
      top 1.58rem
      left 0
      right 0
      bottom 0
     .title
        line-height .54rem
        background #eeeeee
        padding-left .2rem
        color  #666666
        font-size .26rem
     .button-list
        overflow hidden
        padding .1rem .6rem .1rem .1rem
        .button-wrapper
          float left
          width 33.33%
          .button
            text-align center
            margin .1rem
            padding .1rem 0
            border .02rem solid #ccc
            border-radius .06rem
      .item-list
        .item
          line-height .76rem
          padding-left .2rem
</style>
